<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>第一个html代码</title>
</head>
<body>
    <!-- <h1>hello world<h1>
    <h2>hello world<h2>
    <h3>hello world<h3>
    <h4>hello world<h4>
    <h5>hello world<h5>
    <h6>hello world<h6> -->
    
    <p>jjfkfk<p>
    <p>cjfkfgjkb<p>
    <p>djfhbvnbk<p>
    
    <!-- dhhhvvjkvjhdjd
    sdvvkfjfkf
    sndjcjv -->

    zhsgdhch<br/>
    dbhvvufhfj<br/>
    sjdvbvvnv<br/>
    

</body>
</html>